Change an audio item just " by change it " is any one privilege. You can improve that today combination in many ways with out changing the whole tonearm: a change for a diferent build material/weight headshell, changing the wires between the headshell to output cartridge pins connectors, changing the tonearm internal wires, changing the tonearm output IC cables to the phono inputs, changes in cartridge load impedances, fine tunning the tonearm/cartridge set up, etc, etc.
Did you try it?, worth to do it before thinking in a tonearm change.
Even before a tonearm change and for what is the 4P price you could have a better quality cartridge performer than what you own today.
Anyway only a diferent way of thinking about.
Regards and enjoy the music,
R.